66623363 has 2 divisors, whose sum is σ = 66623364. Its totient is φ = 66623362.

The previous prime is 66623351. The next prime is 66623429. The reversal of 66623363 is 36332666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66623363 - 2¹⁴ = 66606979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66623303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33311681 + 33311682.

It is an arithmetic number, because the mean of its divisors is an integer number (33311682).

Almost surely, 2^66623363 is an apocalyptic number.

66623363 is a deficient number, since it is larger than the sum of its proper divisors (1).

66623363 is an equidigital number, since it uses as much as digits as its factorization.

66623363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 35.

The square root of 66623363 is about 8162.3135813322. The cubic root of 66623363 is about 405.3923201398.

The spelling of 66623363 in words is "sixty-six million, six hundred twenty-three thousand, three hundred sixty-three".